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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">com.google.android.exoplayer2.source</a></div>
<h2 title="Interface MediaSource" class="title">Interface MediaSource</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><code><a href="ads/AdsMediaSource.html" title="class in com.google.android.exoplayer2.source.ads">AdsMediaSource</a></code>, <code><a href="BaseMediaSource.html" title="class in com.google.android.exoplayer2.source">BaseMediaSource</a></code>, <code><a href="ClippingMediaSource.html" title="class in com.google.android.exoplayer2.source">ClippingMediaSource</a></code>, <code><a href="CompositeMediaSource.html" title="class in com.google.android.exoplayer2.source">CompositeMediaSource</a></code>, <code><a href="ConcatenatingMediaSource.html" title="class in com.google.android.exoplayer2.source">ConcatenatingMediaSource</a></code>, <code><a href="dash/DashMediaSource.html" title="class in com.google.android.exoplayer2.source.dash">DashMediaSource</a></code>, <code><a href="../testutil/FakeAdaptiveMediaSource.html" title="class in com.google.android.exoplayer2.testutil">FakeAdaptiveMediaSource</a></code>, <code><a href="../testutil/FakeMediaSource.html" title="class in com.google.android.exoplayer2.testutil">FakeMediaSource</a></code>, <code><a href="hls/HlsMediaSource.html" title="class in com.google.android.exoplayer2.source.hls">HlsMediaSource</a></code>, <code><a href="LoopingMediaSource.html" title="class in com.google.android.exoplayer2.source">LoopingMediaSource</a></code>, <code><a href="MaskingMediaSource.html" title="class in com.google.android.exoplayer2.source">MaskingMediaSource</a></code>, <code><a href="MergingMediaSource.html" title="class in com.google.android.exoplayer2.source">MergingMediaSource</a></code>, <code><a href="ProgressiveMediaSource.html" title="class in com.google.android.exoplayer2.source">ProgressiveMediaSource</a></code>, <code><a href="rtsp/RtspMediaSource.html" title="class in com.google.android.exoplayer2.source.rtsp">RtspMediaSource</a></code>, <code><a href="SilenceMediaSource.html" title="class in com.google.android.exoplayer2.source">SilenceMediaSource</a></code>, <code><a href="SingleSampleMediaSource.html" title="class in com.google.android.exoplayer2.source">SingleSampleMediaSource</a></code>, <code><a href="smoothstreaming/SsMediaSource.html" title="class in com.google.android.exoplayer2.source.smoothstreaming">SsMediaSource</a></code></dd>
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<hr>
<pre>public interface <span class="typeNameLabel">MediaSource</span></pre>
<div class="block">Defines and provides media to be played by an <a href="../ExoPlayer.html" title="interface in com.google.android.exoplayer2"><code>ExoPlayer</code></a>. A
 MediaSource has two main responsibilities:

 <ul>
   <li>To provide the player with a <a href="../Timeline.html" title="class in com.google.android.exoplayer2"><code>Timeline</code></a> defining the structure of its media, and to
       provide a new timeline whenever the structure of the media changes. The MediaSource
       provides these timelines by calling <a href="MediaSource.MediaSourceCaller.html#onSourceInfoRefreshed(com.google.android.exoplayer2.source.MediaSource,com.google.android.exoplayer2.Timeline)"><code>MediaSource.MediaSourceCaller.onSourceInfoRefreshed(com.google.android.exoplayer2.source.MediaSource, com.google.android.exoplayer2.Timeline)</code></a> on the
       <a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSource.MediaSourceCaller</code></a>s passed to <a href="#prepareSource(com.google.android.exoplayer2.source.MediaSource.MediaSourceCaller,com.google.android.exoplayer2.upstream.TransferListener)"><code>prepareSource(MediaSourceCaller,
       TransferListener)</code></a>.
   <li>To provide <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriod</code></a> instances for the periods in its timeline. MediaPeriods are
       obtained by calling <a href="#createPeriod(com.google.android.exoplayer2.source.MediaSource.MediaPeriodId,com.google.android.exoplayer2.upstream.Allocator,long)"><code>createPeriod(MediaPeriodId, Allocator, long)</code></a>, and provide a
       way for the player to load and read the media.
 </ul>

 All methods are called on the player's internal playback thread, as described in the <a href="../ExoPlayer.html" title="interface in com.google.android.exoplayer2"><code>ExoPlayer</code></a> Javadoc. They should not be called directly from
 application code. Instances can be re-used, but only for one <a href="../ExoPlayer.html" title="interface in com.google.android.exoplayer2"><code>ExoPlayer</code></a> instance simultaneously.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="MediaSource.MediaPeriodId.html" title="class in com.google.android.exoplayer2.source">MediaSource.MediaPeriodId</a></span></code></th>
<td class="colLast">
<div class="block">Identifier for a <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriod</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static interface&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source">MediaSource.MediaSourceCaller</a></span></code></th>
<td class="colLast">
<div class="block">A caller of media sources, which will be notified of source events.</div>
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<h3>Method Summary</h3>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t5" class="tableTab"><span><a href="javascript:show(16);">Default Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addDrmEventListener(android.os.Handler,com.google.android.exoplayer2.drm.DrmSessionEventListener)">addDrmEventListener</a></span>&#8203;(<a href="https://developer.android.com/reference/android/os/Handler.html" title="class or interface in android.os" class="externalLink" target="_top">Handler</a>&nbsp;handler,
                   <a href="../drm/DrmSessionEventListener.html" title="interface in com.google.android.exoplayer2.drm">DrmSessionEventListener</a>&nbsp;eventListener)</code></th>
<td class="colLast">
<div class="block">Adds a <a href="../drm/DrmSessionEventListener.html" title="interface in com.google.android.exoplayer2.drm"><code>DrmSessionEventListener</code></a> to the list of listeners which are notified of DRM
 events for this media source.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addEventListener(android.os.Handler,com.google.android.exoplayer2.source.MediaSourceEventListener)">addEventListener</a></span>&#8203;(<a href="https://developer.android.com/reference/android/os/Handler.html" title="class or interface in android.os" class="externalLink" target="_top">Handler</a>&nbsp;handler,
                <a href="MediaSourceEventListener.html" title="interface in com.google.android.exoplayer2.source">MediaSourceEventListener</a>&nbsp;eventListener)</code></th>
<td class="colLast">
<div class="block">Adds a <a href="MediaSourceEventListener.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSourceEventListener</code></a> to the list of listeners which are notified of media
 source events.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source">MediaPeriod</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createPeriod(com.google.android.exoplayer2.source.MediaSource.MediaPeriodId,com.google.android.exoplayer2.upstream.Allocator,long)">createPeriod</a></span>&#8203;(<a href="MediaSource.MediaPeriodId.html" title="class in com.google.android.exoplayer2.source">MediaSource.MediaPeriodId</a>&nbsp;id,
            <a href="../upstream/Allocator.html" title="interface in com.google.android.exoplayer2.upstream">Allocator</a>&nbsp;allocator,
            long&nbsp;startPositionUs)</code></th>
<td class="colLast">
<div class="block">Returns a new <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriod</code></a> identified by <code>periodId</code>.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#disable(com.google.android.exoplayer2.source.MediaSource.MediaSourceCaller)">disable</a></span>&#8203;(<a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source">MediaSource.MediaSourceCaller</a>&nbsp;caller)</code></th>
<td class="colLast">
<div class="block">Disables the source for the creation of <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriods</code></a>.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#enable(com.google.android.exoplayer2.source.MediaSource.MediaSourceCaller)">enable</a></span>&#8203;(<a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source">MediaSource.MediaSourceCaller</a>&nbsp;caller)</code></th>
<td class="colLast">
<div class="block">Enables the source for the creation of <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriods</code></a>.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>default <a href="../Timeline.html" title="class in com.google.android.exoplayer2">Timeline</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getInitialTimeline()">getInitialTimeline</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the initial placeholder timeline that is returned immediately when the real timeline is
 not yet known, or null to let the player create an initial timeline.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="../MediaItem.html" title="class in com.google.android.exoplayer2">MediaItem</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMediaItem()">getMediaItem</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the <a href="../MediaItem.html" title="class in com.google.android.exoplayer2"><code>MediaItem</code></a> whose media is provided by the source.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>default <a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTag()">getTag</a></span>()</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span>
<div class="deprecationComment">Use <a href="#getMediaItem()"><code>getMediaItem()</code></a> and <a href="../MediaItem.PlaybackProperties.html#tag"><code>MediaItem.PlaybackProperties.tag</code></a> instead.</div>
</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>default boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isSingleWindow()">isSingleWindow</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns true if the media source is guaranteed to never have zero or more than one window.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#maybeThrowSourceInfoRefreshError()">maybeThrowSourceInfoRefreshError</a></span>()</code></th>
<td class="colLast">
<div class="block">Throws any pending error encountered while loading or refreshing source information.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#prepareSource(com.google.android.exoplayer2.source.MediaSource.MediaSourceCaller,com.google.android.exoplayer2.upstream.TransferListener)">prepareSource</a></span>&#8203;(<a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source">MediaSource.MediaSourceCaller</a>&nbsp;caller,
             <a href="../upstream/TransferListener.html" title="interface in com.google.android.exoplayer2.upstream">TransferListener</a>&nbsp;mediaTransferListener)</code></th>
<td class="colLast">
<div class="block">Registers a <a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSource.MediaSourceCaller</code></a>.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#releasePeriod(com.google.android.exoplayer2.source.MediaPeriod)">releasePeriod</a></span>&#8203;(<a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source">MediaPeriod</a>&nbsp;mediaPeriod)</code></th>
<td class="colLast">
<div class="block">Releases the period.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#releaseSource(com.google.android.exoplayer2.source.MediaSource.MediaSourceCaller)">releaseSource</a></span>&#8203;(<a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source">MediaSource.MediaSourceCaller</a>&nbsp;caller)</code></th>
<td class="colLast">
<div class="block">Unregisters a caller, and disables and releases the source if no longer required.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeDrmEventListener(com.google.android.exoplayer2.drm.DrmSessionEventListener)">removeDrmEventListener</a></span>&#8203;(<a href="../drm/DrmSessionEventListener.html" title="interface in com.google.android.exoplayer2.drm">DrmSessionEventListener</a>&nbsp;eventListener)</code></th>
<td class="colLast">
<div class="block">Removes a <a href="../drm/DrmSessionEventListener.html" title="interface in com.google.android.exoplayer2.drm"><code>DrmSessionEventListener</code></a> from the list of listeners which are notified of DRM
 events for this media source.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeEventListener(com.google.android.exoplayer2.source.MediaSourceEventListener)">removeEventListener</a></span>&#8203;(<a href="MediaSourceEventListener.html" title="interface in com.google.android.exoplayer2.source">MediaSourceEventListener</a>&nbsp;eventListener)</code></th>
<td class="colLast">
<div class="block">Removes a <a href="MediaSourceEventListener.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSourceEventListener</code></a> from the list of listeners which are notified of
 media source events.</div>
</td>
</tr>
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<h4>addEventListener</h4>
<pre class="methodSignature">void&nbsp;addEventListener&#8203;(<a href="https://developer.android.com/reference/android/os/Handler.html" title="class or interface in android.os" class="externalLink" target="_top">Handler</a>&nbsp;handler,
                      <a href="MediaSourceEventListener.html" title="interface in com.google.android.exoplayer2.source">MediaSourceEventListener</a>&nbsp;eventListener)</pre>
<div class="block">Adds a <a href="MediaSourceEventListener.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSourceEventListener</code></a> to the list of listeners which are notified of media
 source events.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>handler</code> - A handler on the which listener events will be posted.</dd>
<dd><code>eventListener</code> - The listener to be added.</dd>
</dl>
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<h4>removeEventListener</h4>
<pre class="methodSignature">void&nbsp;removeEventListener&#8203;(<a href="MediaSourceEventListener.html" title="interface in com.google.android.exoplayer2.source">MediaSourceEventListener</a>&nbsp;eventListener)</pre>
<div class="block">Removes a <a href="MediaSourceEventListener.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSourceEventListener</code></a> from the list of listeners which are notified of
 media source events.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>eventListener</code> - The listener to be removed.</dd>
</dl>
</li>
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<h4>addDrmEventListener</h4>
<pre class="methodSignature">void&nbsp;addDrmEventListener&#8203;(<a href="https://developer.android.com/reference/android/os/Handler.html" title="class or interface in android.os" class="externalLink" target="_top">Handler</a>&nbsp;handler,
                         <a href="../drm/DrmSessionEventListener.html" title="interface in com.google.android.exoplayer2.drm">DrmSessionEventListener</a>&nbsp;eventListener)</pre>
<div class="block">Adds a <a href="../drm/DrmSessionEventListener.html" title="interface in com.google.android.exoplayer2.drm"><code>DrmSessionEventListener</code></a> to the list of listeners which are notified of DRM
 events for this media source.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>handler</code> - A handler on the which listener events will be posted.</dd>
<dd><code>eventListener</code> - The listener to be added.</dd>
</dl>
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<pre class="methodSignature">void&nbsp;removeDrmEventListener&#8203;(<a href="../drm/DrmSessionEventListener.html" title="interface in com.google.android.exoplayer2.drm">DrmSessionEventListener</a>&nbsp;eventListener)</pre>
<div class="block">Removes a <a href="../drm/DrmSessionEventListener.html" title="interface in com.google.android.exoplayer2.drm"><code>DrmSessionEventListener</code></a> from the list of listeners which are notified of DRM
 events for this media source.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>eventListener</code> - The listener to be removed.</dd>
</dl>
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<pre class="methodSignature">@Nullable
default&nbsp;<a href="../Timeline.html" title="class in com.google.android.exoplayer2">Timeline</a>&nbsp;getInitialTimeline()</pre>
<div class="block">Returns the initial placeholder timeline that is returned immediately when the real timeline is
 not yet known, or null to let the player create an initial timeline.

 <p>The initial timeline must use the same uids for windows and periods that the real timeline
 will use. It also must provide windows which are marked as dynamic to indicate that the window
 is expected to change when the real timeline arrives.

 <p>Any media source which has multiple windows should typically provide such an initial
 timeline to make sure the player reports the correct number of windows immediately.</div>
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<pre class="methodSignature">default&nbsp;boolean&nbsp;isSingleWindow()</pre>
<div class="block">Returns true if the media source is guaranteed to never have zero or more than one window.

 <p>The default implementation returns <code>true</code>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the source has exactly one window.</dd>
</dl>
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<pre class="methodSignature"><a href="https://developer.android.com/reference/java/lang/Deprecated.html" title="class or interface in java.lang" class="externalLink" target="_top">@Deprecated</a>
@Nullable
default&nbsp;<a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a>&nbsp;getTag()</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span>
<div class="deprecationComment">Use <a href="#getMediaItem()"><code>getMediaItem()</code></a> and <a href="../MediaItem.PlaybackProperties.html#tag"><code>MediaItem.PlaybackProperties.tag</code></a> instead.</div>
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<pre class="methodSignature"><a href="../MediaItem.html" title="class in com.google.android.exoplayer2">MediaItem</a>&nbsp;getMediaItem()</pre>
<div class="block">Returns the <a href="../MediaItem.html" title="class in com.google.android.exoplayer2"><code>MediaItem</code></a> whose media is provided by the source.</div>
</li>
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<pre class="methodSignature">void&nbsp;prepareSource&#8203;(<a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source">MediaSource.MediaSourceCaller</a>&nbsp;caller,
                   @Nullable
                   <a href="../upstream/TransferListener.html" title="interface in com.google.android.exoplayer2.upstream">TransferListener</a>&nbsp;mediaTransferListener)</pre>
<div class="block">Registers a <a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSource.MediaSourceCaller</code></a>. Starts source preparation if needed and enables the
 source for the creation of <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPerods</code></a>.

 <p>Should not be called directly from application code.

 <p><a href="MediaSource.MediaSourceCaller.html#onSourceInfoRefreshed(com.google.android.exoplayer2.source.MediaSource,com.google.android.exoplayer2.Timeline)"><code>MediaSource.MediaSourceCaller.onSourceInfoRefreshed(MediaSource, Timeline)</code></a> will be called once
 the source has a <a href="../Timeline.html" title="class in com.google.android.exoplayer2"><code>Timeline</code></a>.

 <p>For each call to this method, a call to <a href="#releaseSource(com.google.android.exoplayer2.source.MediaSource.MediaSourceCaller)"><code>releaseSource(MediaSourceCaller)</code></a> is needed
 to remove the caller and to release the source if no longer required.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>caller</code> - The <a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSource.MediaSourceCaller</code></a> to be registered.</dd>
<dd><code>mediaTransferListener</code> - The transfer listener which should be informed of any media data
     transfers. May be null if no listener is available. Note that this listener should be only
     informed of transfers related to the media loads and not of auxiliary loads for manifests
     and other data.</dd>
</dl>
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<pre class="methodSignature">void&nbsp;maybeThrowSourceInfoRefreshError()
                               throws <a href="https://developer.android.com/reference/java/io/IOException.html" title="class or interface in java.io" class="externalLink" target="_top">IOException</a></pre>
<div class="block">Throws any pending error encountered while loading or refreshing source information.

 <p>Should not be called directly from application code.

 <p>Must only be called after <a href="#prepareSource(com.google.android.exoplayer2.source.MediaSource.MediaSourceCaller,com.google.android.exoplayer2.upstream.TransferListener)"><code>prepareSource(MediaSourceCaller, TransferListener)</code></a>.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://developer.android.com/reference/java/io/IOException.html" title="class or interface in java.io" class="externalLink" target="_top">IOException</a></code></dd>
</dl>
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<h4>enable</h4>
<pre class="methodSignature">void&nbsp;enable&#8203;(<a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source">MediaSource.MediaSourceCaller</a>&nbsp;caller)</pre>
<div class="block">Enables the source for the creation of <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriods</code></a>.

 <p>Should not be called directly from application code.

 <p>Must only be called after <a href="#prepareSource(com.google.android.exoplayer2.source.MediaSource.MediaSourceCaller,com.google.android.exoplayer2.upstream.TransferListener)"><code>prepareSource(MediaSourceCaller, TransferListener)</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>caller</code> - The <a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSource.MediaSourceCaller</code></a> enabling the source.</dd>
</dl>
</li>
</ul>
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<pre class="methodSignature"><a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source">MediaPeriod</a>&nbsp;createPeriod&#8203;(<a href="MediaSource.MediaPeriodId.html" title="class in com.google.android.exoplayer2.source">MediaSource.MediaPeriodId</a>&nbsp;id,
                         <a href="../upstream/Allocator.html" title="interface in com.google.android.exoplayer2.upstream">Allocator</a>&nbsp;allocator,
                         long&nbsp;startPositionUs)</pre>
<div class="block">Returns a new <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriod</code></a> identified by <code>periodId</code>.

 <p>Should not be called directly from application code.

 <p>Must only be called if the source is enabled.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>id</code> - The identifier of the period.</dd>
<dd><code>allocator</code> - An <a href="../upstream/Allocator.html" title="interface in com.google.android.exoplayer2.upstream"><code>Allocator</code></a> from which to obtain media buffer allocations.</dd>
<dd><code>startPositionUs</code> - The expected start position, in microseconds.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A new <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriod</code></a>.</dd>
</dl>
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</ul>
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<pre class="methodSignature">void&nbsp;releasePeriod&#8203;(<a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source">MediaPeriod</a>&nbsp;mediaPeriod)</pre>
<div class="block">Releases the period.

 <p>Should not be called directly from application code.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>mediaPeriod</code> - The period to release.</dd>
</dl>
</li>
</ul>
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<pre class="methodSignature">void&nbsp;disable&#8203;(<a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source">MediaSource.MediaSourceCaller</a>&nbsp;caller)</pre>
<div class="block">Disables the source for the creation of <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriods</code></a>. The implementation
 should not hold onto limited resources used for the creation of media periods.

 <p>Should not be called directly from application code.

 <p>Must only be called after all <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriods</code></a> previously created by <a href="#createPeriod(com.google.android.exoplayer2.source.MediaSource.MediaPeriodId,com.google.android.exoplayer2.upstream.Allocator,long)"><code>createPeriod(MediaPeriodId, Allocator, long)</code></a> have been released by <a href="#releasePeriod(com.google.android.exoplayer2.source.MediaPeriod)"><code>releasePeriod(MediaPeriod)</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>caller</code> - The <a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSource.MediaSourceCaller</code></a> disabling the source.</dd>
</dl>
</li>
</ul>
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<pre class="methodSignature">void&nbsp;releaseSource&#8203;(<a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source">MediaSource.MediaSourceCaller</a>&nbsp;caller)</pre>
<div class="block">Unregisters a caller, and disables and releases the source if no longer required.

 <p>Should not be called directly from application code.

 <p>Must only be called if all created <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriods</code></a> have been released by
 <a href="#releasePeriod(com.google.android.exoplayer2.source.MediaPeriod)"><code>releasePeriod(MediaPeriod)</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>caller</code> - The <a href="MediaSource.MediaSourceCaller.html" title="interface in com.google.android.exoplayer2.source"><code>MediaSource.MediaSourceCaller</code></a> to be unregistered.</dd>
</dl>
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